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ITU-T K.135

Technical parameters for residual current operated protective devices with automatic reclosing feature for telecom applications

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Organization: ITU-T
Publication Date: 1 November 2018
Status: active
Page Count: 20
scope:

This Recommendation applies to residual current devices (RCDs) with automatic reclosing (RCDAs) and provides an overview of parameters and testing methods. RCDAs are equipped with an automatic-reclosing feature, called trip-free functionality. This Recommendation also covers built-in RCDAs.

The following device parameters are covered:

• appearance and structure

• enclosure

• dielectric properties

• temperature rise

• operating characteristics

• mechanical and electrical life

• performance at short-circuit current

• test function of the device

• technical requirements for RCDs functionally dependent on line voltage

• working conditions upon over current of main circuits

• surge current performance

• technical requirements for automatic-reclosing devices

• environmental adaption.

This Recommendation does not cover:

• quality assurance requirements.

This Recommendation covers RCDs with automatic reclosing which are owned by network operators and under the supervision of skilled persons, and used within restricted access areas.

NOTE - If there is an inconsistency between a requirement in this Recommendation and a requirement of the domestic laws and regulations which relates to electrical safety, the requirement of the domestic laws and regulations shall take priority.

Document History

ITU-T K.135
November 1, 2018
Technical parameters for residual current operated protective devices with automatic reclosing feature for telecom applications
This Recommendation applies to residual current devices (RCDs) with automatic reclosing (RCDAs) and provides an overview of parameters and testing methods. RCDAs are equipped with an...

References

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